A distance - time graph
shows
how an objectsdistance (how far it
has gone) changes with time.

The picture below
shows a distance - time graph
for an object that is stationary.

The above graph shows an
object which is notmoving
(at rest).
The straight horizontal
line shows that its distancestays the same as
time goes by because it is
notmoving.

The picture below
shows a distance - time graph
for an object with a constant
velocity.

The straight line sloping
upwards in the graph above
shows
that the objectsdistance increases as time goes by.
The object has velocity because it is moving.
The straight line shows that it is a
constant
velocity.
The gradient (slope) of the line
shows how fast the object is going.
The greater the slope,
the bigger the
velocity is.
Compare this with the velocity
- time graph for constant velocity.